Background： Dietary saturated（SFAs） and polyunsaturated（PUFAs） fatty acids can highly affect reproductive functions by providing additional energy, modulating the biochemical properties of tissues, and hormone se...Background： Dietary saturated（SFAs） and polyunsaturated（PUFAs） fatty acids can highly affect reproductive functions by providing additional energy, modulating the biochemical properties of tissues, and hormone secretions. In precocial mammals such as domestic guinea pigs the offspring is born highly developed. Gestation might be the most critical reproductive period in this species and dietary fatty acids may profoundly influence the gestational effort. We therefore determined the hormonal status at conception, the reproductive success, and body mass changes during gestation in guinea pigs maintained on diets high in PUFAs or SFAs, or a control diet.Results： The diets significantly affected the females＇ plasma fatty acid status at conception, while cortisol and estrogen levels did not differ among groups. SFA females exhibited a significantly lower body mass and litter size, while the individual birth mass of pups did not differ among groups and a general higher pup mortality rate in larger litters was diminished by PUFAs and SFAs. The gestational effort, determined by a mother＇s body mass gain during gestation, increased with total litter mass, whereas this increase was lowest in SFA and highest in PUFA individuals. The mother＇s body mass after parturition did not differ among groups and was positively affected by the total litter mass in PUFA females.Conclusions： While SFAs reduce the litter size, but also the gestational effort as a consequence, PUFA supplementation may contribute to an adjustment of energy accumulations to the total litter mass, which may both favor a mother＇s body condition at parturition and perhaps increase the offspring survival at birth.展开更多
Dear Editor,In the European region,which shares 22.8%of the global cancer burden for 10%of the global population,there were around 4.4 million new cancer cases and 1.9 million deaths from cancer in 2020[1].The reasons...Dear Editor,In the European region,which shares 22.8%of the global cancer burden for 10%of the global population,there were around 4.4 million new cancer cases and 1.9 million deaths from cancer in 2020[1].The reasons for the high cancer incidence rates are complex;however,diet and dietary components are among the main contributors to cancer risk[2].In modern-day living,a growing proportion of people include in their diets ultra-processed foods.Byproducts of food processing and home-prepared foods are so-called dietary advanced glycation endproducts(AGEs),which are reactive metabolites emerging during the breakdown of reducing sugar.AGEs production is preponderant in dry high-heat processes(e.g.,baking,roasting);hence foods such as cakes,crisps,crackers,cereal products,meat and meat-derived products represent a major source of dietary AGEs[3].展开更多
基金supported by a PhD completion grant of the University of Vienna during the preparation of the manuscript
文摘Background： Dietary saturated（SFAs） and polyunsaturated（PUFAs） fatty acids can highly affect reproductive functions by providing additional energy, modulating the biochemical properties of tissues, and hormone secretions. In precocial mammals such as domestic guinea pigs the offspring is born highly developed. Gestation might be the most critical reproductive period in this species and dietary fatty acids may profoundly influence the gestational effort. We therefore determined the hormonal status at conception, the reproductive success, and body mass changes during gestation in guinea pigs maintained on diets high in PUFAs or SFAs, or a control diet.Results： The diets significantly affected the females＇ plasma fatty acid status at conception, while cortisol and estrogen levels did not differ among groups. SFA females exhibited a significantly lower body mass and litter size, while the individual birth mass of pups did not differ among groups and a general higher pup mortality rate in larger litters was diminished by PUFAs and SFAs. The gestational effort, determined by a mother＇s body mass gain during gestation, increased with total litter mass, whereas this increase was lowest in SFA and highest in PUFA individuals. The mother＇s body mass after parturition did not differ among groups and was positively affected by the total litter mass in PUFA females.Conclusions： While SFAs reduce the litter size, but also the gestational effort as a consequence, PUFA supplementation may contribute to an adjustment of energy accumulations to the total litter mass, which may both favor a mother＇s body condition at parturition and perhaps increase the offspring survival at birth.
基金the Fondation de France(FDF,grant no.00081166,HF and RC,and FDF grant no.00089811,ALM)the Wereld Kanker Onderzoek Fonds(WKOF),as part of the World Cancer Research Fund(WCRF)International grant programme(WCRF 2015-1391,PI Dr.Mazda Jenab,International Agency for Research on Cancer)。
文摘Dear Editor,In the European region,which shares 22.8%of the global cancer burden for 10%of the global population,there were around 4.4 million new cancer cases and 1.9 million deaths from cancer in 2020[1].The reasons for the high cancer incidence rates are complex;however,diet and dietary components are among the main contributors to cancer risk[2].In modern-day living,a growing proportion of people include in their diets ultra-processed foods.Byproducts of food processing and home-prepared foods are so-called dietary advanced glycation endproducts(AGEs),which are reactive metabolites emerging during the breakdown of reducing sugar.AGEs production is preponderant in dry high-heat processes(e.g.,baking,roasting);hence foods such as cakes,crisps,crackers,cereal products,meat and meat-derived products represent a major source of dietary AGEs[3].
